Reassembly Of Pilot Valve; Lubricants And Sealants; Assembly Of 39Pv07/37 - GE Baker Hughes 2900-40 Series Maintenance Manual

XIX. Reassembly of Pilot Valve
A. Lubricants and Sealants
1. Lubricate all O-Rings, except those made from silicone,
and spring seals sparingly with silicone grease BHGE P/N
SP505.
2. Seal all pipe threads with Teflon tape or pipe sealant
(BHGE P/N SP364-AB).
3. Lubricate standard threads and bearing points with
Flourolube GR362 (BHGE P/N 4668601) or equivalent.
B. Assembly of 39PV07/37
Making the Main Pilot.
1. Making the Adjuster Assembly,
This assembly consists of:
1 – Adjuster Bottom
1 – Adjuster Top
1 – Spring Seal (Adjuster Top)
1 – O-Ring (Adjuster Top)
1 – O-Ring (Adjuster Bottom)
a. Check the Adjuster Top for burrs at the spring seal
lead in chamfer. Remove any burrs using a polishing
cloth.
b. Install Spring Seal (Adjuster Top) into Adjuster Top
using insertion tool as shown in Figure 57 in Section
XXIII.
i. Lubricate Spring Seal (Adjuster Top) with silicone
grease.
ii. Install Spring Seal (Adjuster Top) onto Plunger
Cylinder with spring facing away from Plunger
Cylinder.
iii. Insert Plunger into Plunger Cylinder until Plunger
lightly contacts Spring Seal (Adjuster Top).
iv. Insert Funnel Tube, chamfer side first, over the
Plunger and Spring Seal (Adjuster Top). Stop when
Spring Seal (Adjuster Top) is about half way inside
the Funnel Tube as shown in Figure 32.
Plunger
Spring Seal
(Main Piston)
Figure 32: Funnel Tube
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Plunger Cylinder
Funnel Tube
v. Remove Plunger.
vi. Insert Funnel Tube Assembly into Adjuster Top
until Funnel Tube contacts Spring Seal (Adjuster
Top) gland.
viii. Push down on Plunger cylinder to insert Spring
Seal (Adjuster Top) into Adjuster Top as shown in
Figure 33.
viii. Remove Funnel Tube Assembly.
ix. Inspect Adjuster Top to make sure that Spring Seal
(Adjuster Top) did not flare out during installation
Spring Seal
(Adjuster Top)
Funnel Tube
Figure 33: Plunger Cylinder
and that the Spring Seal (Adjuster Top) is oriented
as shown in Figure 34.
c. Thread Adjuster Top clockwise onto Adjuster bottom
and torque to 27±2 ft-lbs (37± 2.7 N-m).
Spring Seal (Insert)
Adjuster Top
Adjuster Bottom
Figure 34: Adjuster Top Assembly
Consolidated 2900-40 Series POSRV Maintenance Manual | 47
Adjuster Top
Plunger Cylinder